The firmware upgrade process cannot cause any electrical damage, nor can it cause the bootloader to go bad. I would start by upgrading the IOIO firmware to the latest version and convince yourself that it works OK by running it against HelloIOIOConsole running on a PC. If your VREG is indeed fried, your 5V bypass should solve the problem. Please use a voltmeter to verify that you indeed have 5V on the 5V rail with / without the Android connected.
On Tue, Aug 26, 2014 at 1:04 AM, <[email protected]> wrote: > I powered the board directly using 5V and the red light is on. However > when connected to Android phone (with red cable and usb debugging off) the > HelloIOIO app cannot connect to the IOIO (which it did initially before > firmware upgrade). When connected to PC, the IOIODude detects now > application mode with V3 version. > I tried the switch host/android mode with no difference, so what to do > next ? > Is it possible that when USB cable was connected to PC, this somehow > damaged the VREG ? Because all this stuff started when trying to upgrade > the firmware. > > perjantai, 22. elokuuta 2014 21.41.01 UTC+3 Ytai kirjoitti: >> >> On Thu, Aug 21, 2014 at 11:50 PM, <[email protected]> wrote: >> >>> Thank you for your response, I will try to replace the VREG. Does this >>> mean that if I take TPS62130 away, I can power the board directly using 5V >>> pin (with 5V power source) ? >>> >> >> Yes. It is very likely that you can do that even without removing the >> TPS62130. Just try and see whether you see any excessive current draw on >> your source and/or something overheating on the IOIO in the VREG area. >> >> >>> I think that firmware upgrade is ok, but I cannot verify it, because PC >>> cannot communicate with V3 or V5 firmware, only with bootloader. I am using >>> Windows 7, with necessary drivers. >>> >> >> There were previously reports on problems related to the USBID pin, which >> might explain this. I will look into this, and this is likely a simple >> firmware fix, but this will probably not happen within the next two weeks >> or so. In the meantime, if you feel comfortable enough messing with >> hardware, you can locate where this signal is exposed on the board (hint: >> one of the legs of the host mode switch has it) and force it to 3.3V. In >> this condition, if the IOIO becomes visible to the PC in application mode, >> then we verified that this is indeed the problem. >> >> >>> Initially I tried to use Windows 8.1, but it does not recognize IOIO, >>> not even in the bootloader mode, >>> >>> >> -- > You received this message because you are subscribed to the Google Groups > "ioio-users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/ioio-users. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "ioio-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/ioio-users. For more options, visit https://groups.google.com/d/optout.
